Granted Patent
Utility
US 5,543,472 · App. 08/442,520
Concurrent epoxidation and catalyst residue extraction
Inventors:
Craig A. Stevens, Bhaskar P. Rao, Cary A. Veith, James R. Erickson
Patented Case
View Patent ↗
Granted: Aug 6, 1996
Filed: May 16, 1995
Inventors
Craig A. Stevens
Bhaskar P. Rao
Cary A. Veith
James R. Erickson
Assignee (at issue)
SHELL OIL COMPANY
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.